<template>
  <div class="swiper-container" ref="swiper">
    <div class="swiper-wrapper" >
      <div class="swiper-slide" v-for="(item,index) in images"  :key="item.id">
        <img :src="item.imgUrl" 
        :class="{active:currentIndex===index}"
        @click="$emit('update:currentIndex',index)"
        />
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>
  import Swiper from 'swiper'
  import "swiper/css/swiper.min.css"
  export default {
    name: "ImageList",
    props:{
      images:{
        type:Array,
        default: ()=>[]
      },
      currentIndex: {
        type: Number,
        default: 0,
      },
    },
    watch:{
      images(){
        this.$nextTick(()=>{
          new Swiper(this.$refs.swiper,{
             navigation: {
                nextEl: ".swiper-button-next",
                prevEl: ".swiper-button-prev",
              },
              //显示多少张图片
              slidesPerView : 5,
              //每次滚动多少图片
              slidesPerGroup : 1,
          })
        })
      }
    }
  }
</script>

<style lang="less" scoped>
  .swiper-container {
    height: 56px;
    width: 412px;
    box-sizing: border-box;
    padding: 0 12px;

    .swiper-slide {
      width: 56px;
      height: 56px;

      img {
        display: block;
        margin:0 auto;
        border: 1px solid #ccc;
        padding: 2px;
        width: 50px;
        height: 50px;

        &.active {
          border: 2px solid #f60;
          padding: 1px;
        }

        &:hover {
          border: 2px solid #f60;
          padding: 1px;
        }
      }
    }

    .swiper-button-next {
      left: auto;
      right: 0;
    }

    .swiper-button-prev {
      left: 0;
      right: auto;
    }

    .swiper-button-next,
    .swiper-button-prev {
      box-sizing: border-box;
      width: 12px;
      height: 56px;
      background: rgb(235, 235, 235);
      border: 1px solid rgb(204, 204, 204);
      top: 0;
      margin-top: 0;
      &::after {
        font-size: 12px;
      }
    }
  }
</style>